Utilization of heat contained in slags.



v C. VAUTIN. UTILIZATIDH 0F HEAT GONTAIHBD IN SLAGB.

' Ammonium 2mm :un: 10.11011.

1 y ,Y Patented een. 11,1910. y

' vlow pressure vessel and the slag is thus chilledV or granubinetype such Aas a Bateau .Y CLAUDE VAUTIN, oF

LONDON, ENGLANB.

UTILIKZATION OF HEAT CONTAINED N SLAGS.

To all whom it may concern:

Be it known that. l. CLAUDE VAu'riN, a i subject. of the King of England, residing at l London` England, have inventedv certain 'i new and useful Improvements in the Utilization of Heat Contained in Slags, of which l the following is a specilication. n j ll This invention relates to improvements in l the. .utilization of the heat contained in the slugs or scoria produced in the smelting and l reduction of iron and copper ores and the like.

` According to this invention molten slag: is brought into water contained in a closed lated andY then removed from lthe vessel. the

steam produced being led either i straniV engine of the turor Parsons low t to a low pressure l pressure turbine or into a heat. accumulator l such as the. Rateaii heat accumulator which is connected with an engine and condenser. The steam generator or boiler used in this invention is provided with a suitabletrapped l inlet through which the molten slag is adi mitted, the said trapped inlet being placed l at the top or side of the boiler as may be more convenient; also with iiieansfoi" removing the granulated slag, and means of connecting it. with the steam motor.

ln the accompanying drawings which 'llustrate by way of example 'one method of g carryingr this invention into effect, Figure; 1 is a diagram of the apparatus in vertical i section, and Fig. 2 is a vcr'ti al sect-ion of the g slag inlet and. steam outlet on a larger scale. g

Lilte letters indicate lilte'parts throughout the drawings.

The stt-.ani generator consists of a large chamber lined with non-conducting brick unaffected b v the contents and setiii the ground so that. thil top of the chamber is substantially at the saine level as the source B from which the slag is supplied (the slag outlet from furnaces for example). Conveniently the generator has a vertical wall A and three sloping walls so that the generalor comes to a point at the betteln. The generator is covered by a roof A2.

The inlet for molten slag from the supply rhaiinel ll to thi` generator A comprises a reservoir C with an inner wall C over, which the slag. fiovvs into the generator A and a. partition C: so arranged that the slag l Specification of Letters Patent. Applcationled June 26, 199. Serial No.. 504,601.

Vthat it becomes raient-,ea oef. 1i, 1910.

has to {low underneath the partition, the level ot' the slag being above the partit ion on cach side, thus forming :i liquid seal for the inlet at' all times so that. if the pressure of,

the steam in the generator rises above the atmospheric pressure, the. `slag will noty be blown out at the inlet. The dillereuce of level ot' the slag outhe two sides of the partition allows t'or a 'slightly superatiiiospliericr pressure in the generator and the trap also entireljv41 prevents the admission of air to the generator.

The granulation of slagr in water'is alread)v known and in tte presentsysteni the slag is run into ti water ll in gi-*.iiiiilaied and sinks to the bottoni ot the chamber it. fthe slag'is preferably removed continuously by an elevator l such as a sci-ea' conveyor ory bucket ele vator and as the pressure in the generator is about atmospheric pressure this is practicable. ln order to preventescape of steam and to prevent admission of air from the buckets into the generator, the slag elevator or conveyor ll is iuclosed in a casing l*` which extends tit-low the surface of the water, .ind thus the only steam lost will be that generated in the as-ing l". Preferably this casing" forms a separate vertical chain- -ber so that :in v air carried down by the buckets will risc i'ci'ticallv in the chamber F when it escapes and will not pass into the generator proper. vThe cooled slag is discharged into trut-hs (i or is otherwise removed. v

Steam is generate-d in large quantities substantially at. atmosphericpressure and iS led through a suitable outlet pipo H .from the top of the D erator into the steamiuotor J. The Parsons, liateau and other low pressure steam turbines (with or without the usi` of the. lia-teau or the like regener-tuin;r accumulator) work etl'ectively with steam at atmospheric picssi'ire and this invention consists in the use of such motors in combination with the steam generator above described. When such a motor is eniployed, the steazii is igireferabiy conducted through the pipe ll to :in accumulator N and thence through a pipe l to the motor J. The avi-uiiiulator is of a- \vell-`itnowii v'type and is, tlirrel'oi'e, not described iii detail.

rl`he outlet l( for the steam from the boiler such a way 2 Y f f 972,418

of the boiler comes in eontactivith the inflowing stream of molten slag vin or about` sla could be added or` admitted te the boi er by intermittent charges, in which case the use of the intervening heat accumuf lator would be of, particiilaradvantage as the supply ofsteam wouid not be constant. It is also obvious that the chilled or granulated slag could be removed from the boiler intermittently. l. v

In large copper and iron smelting Works where there are several furnaces in operation it `may be of advantaee yfor the slag either to How directly or toie conveyed by means of slag Wagons, to one or more furnaces of the rererberatory tvpe, tol act as a storage system for the molten slav and thus u vpermit an even and continuous flbw of slag into the boiler or boilers; Inthe case of copper smelting works this arrangement also actsas a settler and permitsy the recovery of suspended matte, as will be understood by those skilled in the art of copper smelting. The quantity of fuel necessary to maintain the slag at its normal temperature such as that at which it lcavesthe furnace would be comparatively small, in conse quence of the high initial temperature at which the slag entered the storage' furnace. In many instances the slags would be run vby means of launders direct to tbe boiler;

circumstancesV deciding the most practical course to follow.

In order to eiiectively granulate the slag, the stream of slag upon its entry into the generator is preferab y struck by astream o hot water at a considerable velocity. If cold water were used condensation of the steam might occur and for this reason it is preferable to employ a pump M which draws hot water through a pipe M from the generator and directs it through the pipe M.2 at a considerable velocity against the stream o f molten slag.

What I claim as my invention and desire to secure by Letters Patent isz- 1. In an apparatus for generating and supn plying steam' produced by the heat contained in slag, the combination of a substantially closed steam generator containing water, a trapped inlet for slag thereto, means for removing the slagir continuously from the generator and a steam conduit leading from the generator.

2. In an apparatus for supplying to a low lpressure turbine steam generated by tlic heat contained in slag, the combination of a substantially closed steam generator containing water, a trapped inlet for slag there ously from the generator and a steaml con-v duitleading from the generator.

3. In an apparatus -fo'r generating and supplying steam produced by the heat. contained in slag, thecombination of a substan-y 65 to, means for removing the'slag contiiiutiallj1 closed steam generator containino' wa- Y ter, an inlet having a liquid seal for admitting slag thereto, and means `for cont-inuously lifting and removing the slag from the generator.' t

c 4. In an apparatus for generating and supplying steam produced by the heat contained in slag, the combination of a substantially closed steam generator containing Water, having a slag'inlet comprisinga reservoir with an inner wall' over which the slag tloivs -into the generator, and a partition under which the slag must pass so as to revent the admission of air and to allow or any super-atmospheric pressure in the generator, and means for removing the slag continuously from the generator. 45. In an apparatus for generating and supplying steam produced bythe heat con-A tained in slag, the combination of a substantially closed steaingenerator containing Water, a trapped inlet for. slag thereto, a con-A `tniuous slag elevator extending upward from the bottomof the generator, a casing the surface of the Water.

6. In an apparatus ier .generating and supplying steam produced by the heat contained in slag, the combination of a substantially closed steam generator containing wie ter, a trapped inlet for slag thereto, a bucle d coni-'ayer E extending upward from? the bottom cf the generator, and a casing F inclosing the conveyer and forming a separate vertical chamber.

7. In an apparatus vfor generating and .supplying steam produced by the heat contained iii slag, the combination of'a'substan'- tially closed steam generator containing water, a trapped inlet for slag thereto, an outlet for steam from the generator adjacent to the said inlet and arranged to bring the n steam in contact with the inflowing stream ter, a trapped inlet for slag thereto, means for removing the slag continuously from the generator, a pump arranged to draw hot water from the generator and a nozzle connected to the pump and arranged to direct kthe' liotfwatcr on to the incoming stream of molten slag.

9. In an apparatus for generating and' 95V vinclosing the elevatora'ldextendi-ng below Y Supplying steam produced by the heat c0n` n In testimony l1cxe0f I have signed my tamed in slug, the combination with i; steam name to (hls speclfvntion in the presence of .genel'nfor, and :1 trapped inlet for the ad two subscribing; wlnoxscs.

mission-gf slag thereto, nf .1 steam outlet'ady CLAUDE VAUTI N.

5 iaccnt to the slug inlet, whereby the steam is A"itncssest j Y brought into Contact with und thoroughly H. E. FRANCK, dried bythe molten slag. Y 

